/*
 * Copyright 2010, 2011, 2012 mapsforge.org
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package edu.fib.upc.erdapfel.filefilter;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Accepts all readable directories and all readable files with a given extensions.
 */
public class FilterByFileExtensions implements FileFilter {
	private List<String> extensions = new ArrayList<String>();

	/**
	 * @param extension
	 *            the allowed file name extension.
	 */
	public FilterByFileExtensions(String e) {		
		this.extensions.add(e);
	}	
	
	/**
	 * @param extensions
	 *            the allowed file names extension.
	 */
	public FilterByFileExtensions(List<String> exts) {
		for ( Iterator<String> i = exts.iterator(); i.hasNext();){
			this.extensions.add(i.next());
		}
	}		

	@Override
	public boolean accept(File file) {
		// accept only readable files
		if (file.canRead()) {
			if (file.isDirectory()) {
				// accept all directories
				return true;
			} else if (file.isFile()) {				
				
				boolean res = false;
				for ( Iterator<String> i = this.extensions.iterator(); i.hasNext();){
					boolean b = file.getName().endsWith(i.next());
					res = b || res ;
				}
				
				return res;
			}
		}
		return false;
	}

	public List<String> getExtensions() {
		return extensions;
	}

	public void setExtensions(List<String> extensions) {
		this.extensions = extensions;
	}
}
